Method and apparatus for improved message reception at a fixed system receiver
First Claim
1. A method used in a fixed system receiver for improving response reception in a radio communication system having a forward radio channel and a reverse radio channel, wherein a command is transmitted in a forward channel radio signal by a fixed transmitter to a selective call transceiver, and wherein the method comprises the steps of:
- receiving, demodulating, and decoding the command within a forward receiver, which command also includes an address of the selective call transceiver and a scheduled response time at which the selective call transceiver transmits a reverse channel radio signal comprising a data unit, and which command includes a designated length of the data unit;
determining a response period beginning substantially at the scheduled response time and having a duration which is substantially the designated length of the data unit; and
receiving and demodulating the reverse channel radio signal within a reverse receiver during the response period.
4 Assignments
0 Petitions
Accused Products
Abstract
A fixed system receiver (107), which includes a forward receiver (305), a reverse receiver (310), and a response timer (215), is for use in a radio communication system (100) having a forward radio channel and a reverse radio channel. A command is transmitted in a forward channel radio signal to a selective call transceiver. The forward receiver (305) is for receiving, demodulating, and decoding the command. The reverse receiver (310) is for receiving and demodulating the reverse channel radio signal. The response timer (215), which is coupled to the forward receiver (305) and the reverse receiver (310), is for determining a response period beginning substantially at a scheduled response time included in the command and having a duration which is substantially a designated length of the data unit included in the command, and for generating a control signal which enables the reverse receiver (310) during the response period.
21 Citations
21 Claims
-
1. A method used in a fixed system receiver for improving response reception in a radio communication system having a forward radio channel and a reverse radio channel, wherein a command is transmitted in a forward channel radio signal by a fixed transmitter to a selective call transceiver, and wherein the method comprises the steps of:
-
receiving, demodulating, and decoding the command within a forward receiver, which command also includes an address of the selective call transceiver and a scheduled response time at which the selective call transceiver transmits a reverse channel radio signal comprising a data unit, and which command includes a designated length of the data unit; determining a response period beginning substantially at the scheduled response time and having a duration which is substantially the designated length of the data unit; and receiving and demodulating the reverse channel radio signal within a reverse receiver during the response period. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A fixed system receiver for use in a radio communication system having a forward radio channel and a reverse radio channel, wherein a command is transmitted in a forward channel radio signal from a system controller by a fixed transmitter to a selective call transceiver, and wherein the fixed system receiver comprises:
-
a forward receiver for receiving, demodulating, and decoding the command, which command includes an address of the selective call transceiver and a scheduled response time at which the selective call transceiver transmits a reverse channel radio signal comprising a data unit, and which command includes a designated length of the data unit; a reverse receiver for receiving and demodulating the reverse channel radio signal; and a response timer, coupled to said forward receiver and said reverse receiver, said response timer for determining a response period beginning substantially at the scheduled response time and having a duration which is substantially the designated length of the data unit, and for generating a control signal which enables said reverse receiver during the response period. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
-
-
21. A fixed system receiver for use in a radio communication system having a forward radio channel and a reverse radio channel, wherein a command is transmitted in a forward channel radio signal by a fixed transmitter to a selective call transceiver, and wherein the fixed system receiver comprises:
-
a combined receiver for receiving, demodulating, and decoding the command included in the forward channel radio signal having a first radio carrier frequency, which command includes an address of the selective call transceiver and a scheduled response time at which the selective call transceiver transmits a reverse channel radio signal having the first radio carrier frequency, said reverse channel radio signal comprising a data unit, and which command includes a designated length of the data unit, said combined receiver also for receiving and demodulating the reverse channel radio signal; a response timer, coupled to said combined receiver, said response timer for determining a response period beginning substantially at the scheduled response time and having a duration which is substantially the designated length of the data unit, and for generating a control signal which enables said combined receiver during the response period and disables said combined receiver at times which are not the response period; and a controller, coupled to said combined receiver, said controller for decoding a received data unit from the demodulated reverse channel radio signal received at the scheduled response time, for routing the received data unit to a system controller when the received data unit has the designated length of the data unit and when the received data unit includes a transceiver address which matches the address of the selective call transceiver, and otherwise terminating processing of the received data unit, and wherein the forward radio channel has a plurality of forward channel frame boundaries and wherein a reverse channel frame boundary, which is relative to one of the plurality of forward channel frame boundaries, is included in the command, and wherein the scheduled response time is relative to the reverse channel frame boundary.
-
Specification